Butter Pecan Cake Mix Recipe

Im making a western birthday cake and my customer has requested a butter pecan flavored cake-have used box mixes but have not been satisfied with the taste. Does anyone have a really good recipe and would like to share?

I use the BC butter pecan mix, but add a box of cheesecake pudding or white chocolate pudding, 4 eggs, 3/4 C each of oil and water, and 2 tsp vanilla or some other extract. Mix for 6 minutes and bake. This comes out nice and moist.